JP3133228B2 - Display device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display device used for AV (Audio Visual) equipment and OA (Office Automation) equipment.

[0002]

2. Description of the Related Art In recent years, home televisions used as AV equipment and display devices used for OA equipment have been reduced in weight.
There is a demand for thinner, lower power consumption, higher definition, and larger screens. For this reason, CRT (cathode ray tub)
e), liquid crystal display (LCD), plasma display (P
DP), EL (electroluminescent) display, LED
(Light emitting display) A display device such as a display device is also being developed and put into practical use to have a large screen.

[0003] Among them, the liquid crystal display device has the advantages that the thickness (depth) can be remarkably reduced, the power consumption is small, and the full color display is easy, compared with other display devices. It is being used in various fields, and there is great expectation for larger screens.

On the other hand, when the size of the screen of the liquid crystal display device is increased, a defective rate due to disconnection of a signal line, a pixel defect, or the like in a manufacturing process sharply increases, and further, the price of the liquid crystal display device increases. Such a problem arises. Therefore, in order to solve this, a plurality of liquid crystal panels are connected to form a single multi-display type liquid crystal display device as a whole, and the screen is enlarged.

However, in the above-described multi-display type liquid crystal display device, in a display device in which liquid crystal panels are connected to each other, the connection portion of the liquid crystal panel has a problem such that light of a backlight leaks from a gap generated at a connection portion of each liquid crystal panel. Easy to stand out. On the other hand, the applicant has previously filed Japanese Patent Application
No. 29395 proposes an active matrix type liquid crystal display device in which a connection portion between display screens is inconspicuous and a natural large screen image can be obtained.

Among the conventional liquid crystal display devices, for example, in a liquid crystal display device 51 shown in FIG.
Are connected, and this is connected to the large substrate 56 and the large substrate 5.
7 and stuck together. Further, a polarizing plate 59 is disposed on the outer surface of each of the large substrates, and a backlight such as a cold cathode tube is provided on the back (lower side in the figure) of the liquid crystal panel 52 as a display panel. In the figure, a driver for controlling an image signal and a backlight are omitted. The liquid crystal panel 52 modulates the light of the backlight according to the image information, so that the observer can observe the image information input to the liquid crystal panel 52. FIG. 9 shows a state in which the liquid crystal panels 52 are connected.

[0007] The liquid crystal panel 52 has a TFT (th
A glass substrate 53 on which a switching element, a pixel electrode, and the like are formed, and a glass substrate 54 on which a common electrode is formed are bonded to each other via a sealing material (not shown). At this time, the pixel electrode and the common electrode are arranged to face each other, and a liquid crystal (not shown) is sealed between the two. A non-light-transmitting pattern (not shown) made of a non-light-transmitting material on the pixel electrode and serving as a shadow mask for preventing light leakage and color bleeding from an adjacent pixel is provided between adjacent pixels. It is formed along the boundary.

In the liquid crystal display device 51, the liquid crystal panel 5
In order to make the connection between the two less noticeable, for example, the following structure is employed. In other words, the glass substrate 53.5 has an adhesive property such as an ultraviolet curable adhesive, and has a glass substrate 53.5.
4. The liquid crystal panels 52 are joined to each other using an adhesive (refractive index adjusting material) 58 having substantially the same refractive index as the large substrates 56 and 57. Further, the adhesive 58 is applied to the entire surface on both sides of the liquid crystal panel 52. The large substrates 56 and 57 are bonded together by painting.

In the conventional liquid crystal display device, for example, in a liquid crystal display device 61 shown in FIG. 8B, the large substrate 56 is not adhered to the glass substrate 53 by the adhesive 58 without using the large substrate 57. The structure which sticks to is adopted.

In general, when connecting a plurality of liquid crystal panels, if the end face of the joint portion of the panel substrate is in contact with a medium having a different refractive index (eg, air), light is refracted. In addition, if the end face becomes rough at the time of processing, irregularities are formed there, and refraction and scattering of light occur. As a result, the connection portion of the liquid crystal panel becomes conspicuous.

However, in the liquid crystal display devices 51 and 61, the use of the adhesive 58 allows the liquid crystal panel 5 to be used.
At the connection between the two, the refractive index is adjusted, so that refraction and scattering of light can be prevented, and a natural image can be obtained in which the connection is less noticeable.

[0012]

However, the above liquid crystal display device 51 has the following problems.

In the liquid crystal display device 51, since the adhesive 58, which is a refractive index adjusting material, is used, the adhesive 58 causes a volume shrinkage of 5 to 10% upon curing, and the liquid crystal panel 52 is distorted. Let it. That is, due to such a curing shrinkage phenomenon, as shown in FIG.
A force (indicated by an arrow in the drawing) acts in a direction in which the glass substrate 53 and the glass substrate 54 forming the second 2 are separated from each other, and changes the cell gap of the liquid crystal panel 52. For this reason,
Color unevenness occurs on the screen display.

On the other hand, the liquid crystal display device 6 shown in FIG.
In No. 1, since the large substrate 57 is not used, the glass substrate 53 and the glass substrate
Are applied in the same direction (indicated by arrows in the figure), and do not change the cell gap of the liquid crystal panel 52. However, in this case, since the large-sized substrate 57 is not used, a connection portion between the liquid crystal panels 52 is exposed, and this portion is conspicuous.

The reason is that the adhesive 58 as a refractive index adjusting material
When the liquid crystal panel 52 is bonded on the same plane of the large-sized substrate 56 by this, the adhesive 58 protrudes from the connection portion between the liquid crystal panels 52, and a step or unevenness is formed, so that light passing through this connection portion is scattered. This causes the polarization state to change, and the black state of the polarizing plate 59 due to crossed Nicols cannot be maintained.

The present invention has been made in view of the above circumstances, and there is no unevenness in the color of the screen display due to a change in the cell gap of the liquid crystal panel 52, and the connection portion between the liquid crystal panels 52 is inconspicuous. It is an object of the present invention to provide a large-screen liquid crystal display device of display quality.

[0017]

According to a first aspect of the present invention, there is provided a display device, comprising: a plurality of display devices disposed between a large-sized substrate and a flexible coating layer; The panels are arranged adjacent to each other and filled with an adhesive, and the display panels are joined to each other by the adhesive, and
The display panel is bonded to the large-sized substrate and the covering layer.

A display device according to a second aspect of the present invention is the display device according to the first aspect, wherein the coating layer is made of a polymer film.

A display device according to a third aspect of the present invention is the display device according to the second aspect, wherein the polymer film is optically isotropic.

The display device according to claim 4 of the present invention, 請
The display device according to any one of claims 1 to 3,
And the display panel is a pair of bonded glass substrates.
And a liquid crystal sealed between the substrates.
The adhesive is almost the same as the glass substrate, the large substrate, and the coating layer.
It is characterized by having substantially the same refractive index .

According to a fifth aspect of the present invention, in the display device, an adhesive is filled between a plurality of display panels disposed adjacent to each other and a large-sized substrate disposed on one surface side of these display panels. The display panel is joined to each other by the adhesive, and the display panel and the large-sized substrate are joined to each other, while the other surface of the display panel is covered only by the coating made of the adhesive. It is characterized by having.

According to a sixth aspect of the present invention, there is provided a display device comprising:
The display device according to any one of claims 1 to 5,
The display panel is a liquid crystal panel, and the display panel is
A backlight is provided on one side of the
Layer is bonded to the backlight side of the display panel.
It is characterized by that.

A display device according to a seventh aspect of the present invention is a
The display device according to any one of claims 1 to 6, wherein
To make the distance between the large substrate and the display panel uniform.
It is characterized by that.

[0024]

According to the first aspect of the present invention, since the display device has the flexible coating layer on one entire surface of the display panel, the adhesive filled between the large substrate and the display panel is provided. Even if the material undergoes volume shrinkage during curing, the force applied to the display panel is buffered by the bending of the coating layer.

As a result, the cell gap of the display panel can be kept uniform, and color unevenness does not occur on the display screen.

As a result, a large-screen display device using the multi-display system can be provided with high display quality without unevenness in color of the screen display and with less noticeable connection between the display panels.

According to the structure of the second aspect, the display device has the polymer film bonded to the entire surface of one of the display panels with an adhesive. Therefore, the force applied to the display panel is sufficiently buffered by the very flexible polymer film, the cell gap of the display panel is kept uniform, and the color unevenness of the display screen is eliminated.

According to the third aspect of the present invention, since the polymer film is optically isotropic, the polarization state of the display light controlled by the display panel is disturbed by the polymer film. And the display quality can be maintained.

According to the fourth aspect, the display panels are connected to each other.
Refraction due to unevenness of the substrate end surface at the connection part
・ Scattering can be prevented, and the display panel and large size
Light reflection at the interface between the substrate and the display panel and the coating layer
It is possible to prevent radiation and improve the display contrast.

According to the fifth aspect of the present invention, the display device has only the coating made of the adhesive on one entire surface of the display panel.
The display panel is not affected.

As a result, similar to the structure of the first aspect, a large-screen display device using a multi-display system is provided with high display quality without unevenness in color of the screen display and with less noticeable connection between the display panels. be able to.

According to the seventh aspect of the present invention, the display panel has a step.
There is no difference.

[0033]

[Embodiment 1] An embodiment of the present invention will be described below with reference to FIGS.

As shown in FIG. 1, the display device according to the present embodiment is a direct-view type liquid crystal display device 1. Liquid crystal display device 1
Is composed of two active matrix type liquid crystal panels 2 connected to each other, disposed between a large substrate 6 and a polymer film 7, and bonded together. Further, a polarizing plate 9 is disposed on the outer surface of the large substrate 6 and the polymer film 7, respectively, and a backlight such as a cold cathode tube is provided on the back (lower side in the figure) of the liquid crystal panel 2 as a display panel. I have. It should be noted that a driver for controlling an image signal and a backlight are omitted in the drawing. In this embodiment, a case where two liquid crystal panels 2 are connected is described. However, the present invention is not limited to this, and a larger screen may be achieved by connecting a plurality of liquid crystal panels 2.

As shown in FIG. 2, the liquid crystal panel 2
It has an active matrix type liquid crystal panel structure using a matrix active element, and has a sealant 10
The glass substrates 3 and 4 are bonded to each other on the same plane via a substrate, and a liquid crystal 13 is sealed between the glass substrates 3 and 4. At this time, a pixel electrode 17 described later is used.
And the common electrode 18 are arranged to face each other.

As shown in FIG. 3, on the glass substrate 3, a scanning electrode (gate electrode) 14, a data electrode (source electrode) 15, and a thin film transistor (TFT) 16, which is disposed at the intersection of these electrodes, The pixel electrode 17 is formed. The TFT 16 is a field-effect transistor using a semiconductor film, and controls supply of an image signal to the pixel electrode 17.

The common electrode 1 is provided on the glass substrate 4.
8 are formed, and when performing color display,
R (red), G (green), B corresponding to each pixel electrode 17
The (blue) color filter 19 and the non-translucent pattern 12 for separating each pixel are formed. The non-translucent pattern 12 is also called a black matrix, and may be provided not only on the glass substrate 4 side but also on the glass substrate 3 side.

This black matrix is composed of each pixel electrode 1
It is provided to block light from entering the space between the TFTs 7 and the TFT area. When light passes through the area other than the pixel electrode 17, the quality of the black display state is reduced and the contrast is reduced. Further, when light enters the TFT 16, a leakage current is generated in the TFT channel due to light excitation, and the display quality deteriorates. The black matrix prevents this.

The liquid crystal panel 2 constructed as described above
The glass substrate 4 and the polymer substrate 7 are bonded to each other by the adhesive 8. The large substrate 6 is bonded to the glass substrate 4 and the polymer film 7 is bonded to the glass substrate 3. Since the large-sized substrates 6 are bonded to each other, a step or a flaw due to the influence of the variation in the glass thickness or the warpage generated when the liquid crystal panels 2 are connected to each other is not exposed. The impact resistance of the liquid crystal display device 1 having a large area is increased.

Further, a polarizing plate 9 is provided on almost the entire outer surface of the large-sized substrate 6 and the polymer film 7 in a direction in which the polarization axes are orthogonal to each other. For this reason, at the connection portion between the liquid crystal panels 2, light leakage due to the backlight exhibits black in the crossed Nicols state of the polarizing plate 9, and has an effect of making the connection portion between the liquid crystal panels 2 inconspicuous.

As the polymer film 7, a film having excellent flexibility at the same time as transmitting ultraviolet light is used. As the polymer film 7, a film having optical isotropy is used in addition to the polymer film. This is if the polymer film 7
This is because, if optical anisotropy (birefringence) exists, the polarization state of display light controlled by the liquid crystal panel 2 is disturbed by the polymer film 7, which leads to a decrease in display quality.

Therefore, in order not to lower the display quality,
Optical anisotropy value (retardation: Δn
It is necessary to use a polymer film having a small d). In this embodiment, since a polymer film having Δnd of 50 nm or less is used, good display characteristics can be obtained.

The material of the polymer film that can be used here includes polyester, polyarylate, polyethersulfone (PES), polycarbonate (PC) and the like. Among them, polyester (polyethylene terephthalate (PET)) is obtained by polycondensation of terephthalic acid or dimethyl terephthalate with ethylene glycol. In particular, those formed into a uniaxially stretched film have heat resistance (can be used even at 160 ° C), It has excellent chemical resistance (resistance to strong acidic chemicals, strong alkaline chemicals, and organic solvents) and optical characteristics (△ nd ≦ 50 nm is possible), and is most suitable as the material of the polymer film 7 of this embodiment at this stage.

As the adhesive 8, a refractive index adjusting agent having substantially the same refractive index as that of the glass substrates 3 and 4, the large substrate 6, and the polymer film 7 is used. Thereby, the refraction and refraction of light caused by the unevenness of the substrate end surface at the connection portion between the liquid crystal panels 2 are performed.
Scattering can be prevented, and reflection of light occurring at the interface between the glass substrate 4 and the large-sized substrate 6 and between the glass substrate 3 and the polymer film 7 can be prevented, so that display contrast can be improved.

As such an adhesive 8, an ultraviolet-curable adhesive which is used for bonding optical lenses and the like, and which accelerates curing instantly only by irradiating ultraviolet rays, is suitable. And this is the glass substrate 3.
There is an advantage that a material having substantially the same refractive index as that of the substrate 4 and the large substrate 6 can be easily obtained.

Next, a method for manufacturing the above-described liquid crystal display device 1 will be described. FIG. 5 shows the manufacturing process step by step.

(A) First, on the plane of the large substrate 6, 2
The two liquid crystal panels 2 are placed adjacent to each other. At this time, the liquid crystal panel 2 is arranged so that the glass substrate 4 side faces the large substrate 6. In addition, the distance between the liquid crystal panels 2 and the large-sized substrate 6 is kept uniform so that no step is formed. Therefore, for example, it is effective to spray plastic beads as spacers on the large substrate 6 over the entire surface. Then, a space between the large substrate 6 and each of the liquid crystal panels 2 is filled with an ultraviolet-curable adhesive 8.

(B) When the positioning of the two liquid crystal panels 2 has been sufficiently performed, ultraviolet rays (arrows in the figure) are irradiated from the large substrate 6 side to the entire surface to cure the adhesive 8.

(C) Next, a polymer film 7 is arranged so as to face the glass substrate 3 side of the liquid crystal panel 2, and an adhesive 8 is filled between the two. The polymer film 7 transmits ultraviolet rays, has optical isotropy, and has flexibility.

(D) Further, the entire surface of the polymer film 7 is irradiated with ultraviolet rays (arrows in the figure) to cure the adhesive 8. The adhesive 8 uses a refractive index adjuster having a refractive index substantially the same as that of the glass substrates 3 and 4, the large substrate 6, and the polymer film 7. In the present embodiment, for example, a material having a refractive index of 1.54 is used. use. (The polarizing plate 9, the driver, and the backlight are provided in the same manner as in the conventional example.) The ultraviolet curable adhesive 8 used at the time of manufacturing the above-described liquid crystal display device 1 shows fluidity before curing, and The curing is promoted by irradiating with a suitable ultraviolet ray. At this time, a volume shrinkage of 5 to 10% generally occurs, but since the polymer film 7 is flexible, the shrinkage due to the curing of the adhesive 8 is buffered, and no distortion occurs in the cell gap of the liquid crystal panel 2. Therefore, the cell gap is kept uniform,
No color unevenness occurs on the display screen.

Further, since the polymer film 7 is optically isotropic, it has a function of not disturbing the polarization state of light of the backlight.

Therefore, with the above configuration, it is possible to provide a large-screen liquid crystal display device using a multi-display system with a high display quality in which the color of the screen display is not uneven and the connection portions between the liquid crystal panels 2 are inconspicuous. .

In the above description, the use of the polymer film 7 prevents the cell gap of the liquid crystal panel 2 from becoming non-uniform due to the adhesive 8, but is not particularly limited. As shown in FIG.
A thin glass plate 11 may be used for the liquid crystal display device 31 instead of the polymer film 7. In this case, the glass plate 11 is bonded to the glass substrate 3 side with the adhesive 8 like the polymer film 7.

As the thin glass plate 11, for example,
Those with a thickness of 0.7 mm or less have the characteristic that they are extremely flexible. Therefore, the glass plate 11 buffers the shrinkage of the adhesive 8 due to the above-described curing, and can prevent the cell gap of the liquid crystal panel 2 from becoming uneven.

Embodiment 2 A further embodiment of the present invention will be described as Embodiment 2 with reference to FIGS. 6 and 7. In addition,
The members having the same functions as those of the first embodiment are denoted by the same reference numerals, and the description thereof will be omitted.

As shown in FIG. 6, the liquid crystal display device 21 of this embodiment has a liquid crystal display panel 2, a large substrate 6, a polarizing plate 9,
And an adhesive 8 (refractive index filler) as in Example 1, but without the polymer film 7 and the thin glass plate 11. That is, the feature is that the same effect as in the first embodiment is to be obtained only by the cured film of the adhesive 8. It should be noted that a driver for controlling an image signal and a backlight are omitted in the drawing. In this embodiment,
The case where two liquid crystal panels 2 are connected will be described. However, the present invention is not limited to this, and a larger screen may be obtained by connecting a plurality of liquid crystal panels.

Hereinafter, a method for manufacturing the above-described liquid crystal display device 21 will be described. FIG. 7 shows the manufacturing process step by step.

(A) and (b) First, two liquid crystal panels are formed on the plane of the large substrate 6 in the same manner as in the manufacturing steps (a) and (b) of the liquid crystal display device 1 described in the first embodiment. 2 and the liquid crystal panel 2
Is filled with an ultraviolet curable adhesive 8 and cured.

(C) Next, a film 71 is arranged so as to face the glass substrate 3 side of the liquid crystal panel 2, and an adhesive 8 is filled between the two. The film 71 transmits ultraviolet light and has flexibility.

(D) Further, the entire surface of the film 71 is irradiated with ultraviolet rays (arrows in the figure) to cure the adhesive 8.

(E) Thereafter, the film 71 is peeled off,
The cured film of the adhesive 8 is exposed on the entire surface. (The polarizing plate 9, the driver, and the backlight are provided in the same manner as in the conventional example.) Note that if the bonding surface between the film 71 and the adhesive 8 is coated in advance with a silicon or fluorine-based release agent, the film 71 is peeled off. Can be easily performed.

The liquid crystal display device 21 is manufactured as described above. As a result, the shrinkage due to the curing of the adhesive 8 is buffered by the flexible film 71 and the cell gap is not distorted in the liquid crystal panel 2. In addition, since the film 71 is peeled off, it does not affect display light at all. Therefore, a large-screen liquid crystal display device using the multi-display method can be provided with high display quality as in the first embodiment.

Since the film 71 is peeled off after the adhesive 8 is cured as described above, it is not necessary to be optically isotropic, and a material can be easily obtained. Moreover, the film 71 can be reused after the above-described peeling, and is economical.

In the first and second embodiments, an example in which an ultraviolet curable adhesive is used as the adhesive 8 to be used has been described. However, the present invention is not limited to this. If this is satisfied, a thermosetting adhesive or a chemically reactive adhesive can also be used.

In the first and second embodiments described above, the multi-panel type liquid crystal display devices 1, 31 and 21 are connected to the active matrix drive type liquid crystal panel 2 to increase the screen size. The present invention is not limited to this, and a duty-driven liquid crystal panel may be connected.

Further, in the above-described first and second embodiments, as the multi-panel display device, a display device in which the liquid crystal panels 2 are connected to each other is proposed. However, the present invention is not limited to this. (Electroluminescen
t) The present invention can also be applied to a case where display devices are connected to each other.
However, since the influence on the cell gap can be eliminated,
The connection between the liquid crystal panels 2 is more effective for application to a display device.

[0067]

As described above, in the display device according to the first aspect, the display panels are joined to each other by the adhesive, and the display panel is joined to the large-sized substrate and the flexible covering layer. Configuration.

As a result, the coating layer bends due to the volume shrinkage caused by the curing of the adhesive, so that the force applied to the display panel is buffered and the cell gap of the display panel is kept uniform.
As a result, a large-screen display device using the multi-display method
There is an effect that the display can be provided with high display quality, in which there is no unevenness in the color of the screen display and the connection between the display panels is inconspicuous.

In the display device according to the second aspect, the coating layer is a polymer film.

As a result, the force applied to the display panel due to the volume shrinkage of the adhesive is buffered, the cell gap of the display panel is kept uniform, and the color unevenness of the display screen is eliminated.

In the display device according to the third aspect, the polymer film is optically isotropic.

As a result, there is an effect that the polarization state of the display light controlled by the display panel is stabilized and the display quality can be maintained.

In the display device according to a fourth aspect, the display
The panel is a pair of bonded glass substrates
Having a liquid crystal sealed between the substrates, wherein the adhesive is
Almost the same refractive index as glass substrates, large substrates, and coating layers
It is a structure which has .

As a result, the connection between the display panels is
Of light refraction and scattering caused by unevenness of the substrate end surface
Can also display panel and large substrate and table
Prevents light reflection at the interface between the display panel and the coating layer,
There is an effect that the indicated contrast can be improved .

In the display device according to the fifth aspect, while the display panels are joined to each other by the adhesive and the display panel is joined to the large-sized substrate, the other surface of the display panel is
In this configuration, only the film made of the adhesive is covered.

As a result, the film bends due to the volume shrinkage caused by the curing of the adhesive, so that the force applied to the display panel is buffered and the cell gap of the display panel is kept uniform. As a result, there is an effect that a large-screen display device using the multi-display method can be provided with high display quality without color unevenness in the screen display and with less noticeable connection between the display panels.

According to claim 7 of the present invention, the large substrate and the
In this configuration, the distance from the display panel is uniform. to this
This has the effect that no steps are formed on the display panel.
You.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view schematically illustrating a configuration of a liquid crystal display device according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view illustrating a configuration of a liquid crystal panel provided in the liquid crystal display device.

FIG. 3 is a perspective view illustrating a configuration of a liquid crystal panel provided in the liquid crystal display device.

FIG. 4 is a cross-sectional view schematically showing another configuration of the liquid crystal display device according to one embodiment of the present invention.

FIGS. 5A to 5D are cross-sectional views illustrating an example of a manufacturing process of the liquid crystal display device in a stepwise manner.

FIG. 6 is a cross-sectional view schematically illustrating a configuration of a liquid crystal display according to another embodiment of the present invention.

7A to 7E are cross-sectional views illustrating an example of a manufacturing process of the liquid crystal display device in FIG. 6 in a stepwise manner.

FIG. 8 is a cross-sectional view schematically showing a configuration of a conventional liquid crystal display device.

FIG. 9 is a plan view showing a state in which two liquid crystal panels of the liquid crystal display device are joined.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 liquid crystal display device (display device) 2 liquid crystal panel (display panel) 3 glass substrate 4 glass substrate 6 large substrate 7 polymer film (coating layer) 8 adhesive (refractive index filler, coating) 9 polarizing plate 11 glass plate ( Coating layer)

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-1-189626 (JP, A) JP-A-4-3089 (JP, A) JP-A-61-205916 (JP, A) JP-A-6-205 148610 (JP, A) JP-A-1-195421 (JP, A) JP-A-61-260222 (JP, A) JP-A-56-175817 (JP, U) (58) Fields investigated (Int. ⁷ , DB name) G02F 1/1347 G02F 1/13 101 G02F 1/1333 G09F 9/30

Claims (7)

(57) [Claims] 1. A display device comprising: a plurality of display panels disposed adjacent to each other between an opposing large-sized substrate and a flexible covering layer; and an adhesive filled therein, and the display panels are joined to each other by the adhesive. And the display panel is bonded to the large-sized substrate and the covering layer. 2. The display device according to claim 1, wherein said coating layer is made of a polymer film. 3. The display device according to claim 2, wherein the polymer film is optically isotropic. 4. The display panel according to claim 1, wherein the display panel comprises a pair of bonded panels.
It has a glass substrate and a liquid crystal sealed between these substrates.
And the adhesive is used for the glass substrate, the large substrate, and the coating.
2. The method according to claim 1, wherein the layer has substantially the same refractive index as the layer.
4. The display device according to any one of claims 3 to 3. 5. An adhesive is filled between a plurality of display panels disposed adjacent to each other and a large-sized substrate disposed on one surface side of these display panels, and the display panels are connected to each other by the adhesive. A display device, wherein the display panel and the large-sized substrate are joined together, and the other surface of the display panel is covered only with a film made of the adhesive. 6. The display panel is a liquid crystal panel, and a backlight is provided on one side of the display panel.
The above-mentioned coating layer is bonded to the backlight side surface of the display panel.
The method according to any one of claims 1 to 5, wherein
2. The display device according to claim 1. 7. A space between the large-sized substrate and the display panel.
7. The method according to claim 1, wherein the temperature is uniform.
2. The display device according to claim 1.